The 36WRB0509S-3WR2 from Ideal Power Ltd is a DC to DC Converter with Input Voltage 4.5 to 9 V, Output Voltage 1 9 V, Output Current 1 14 to 278 mA, Output Power 3000 mW, Isolation Voltage 1500 V. Tags: Through Hole, Buck-Boost. More details for 36WRB0509S-3WR2 can be seen below.